At a party or other place that results in a lot of drinking on TV, especially if the place is far enough away to require driving, there is usually one person, pre-selected or out of his/her own volition, who has to not drink at all in order to remain sober enough to drive the other partygoers/drinkers home safely. This is known as the designated driver. This is a Truth in Television, as most times in order to follow road safety laws, people aren't allowed to drive home if drunk. Examples: